Abstract: The effect of 3 D printing process parameters on the warpage deformation of ABS plastic mobile phone shell was studied.Resultsshowed that the best combination of process parameters was when the temperature of feeding section was 200℃, the temperature of compression section 210℃, the temperature of homogenization section 230℃, the printing rate 40 mm/s, and the printing platform temperature 60℃. For the printing temperature parameters, the compression section temperature and homogenization section temperature had significant effects on the warpage of the workpiece, while the temperature of the feeding section had a little effect on the warpage; in addition, the printing rate and printing platform temperature also had significant influence on the warpage. Ten groups of ABS plastic mobile phone shell were prepared under the optimal process parameters. The maximum warpage deformation of the corresponding parts was 0.056 2 mm, and the minimum was 0.051 2 mm. The absolute error of each group of parts was small, with the maximum only 0.001 8 mm and the minimum 0.051 2 mm. The standard deviation of ten groups of experiments was 0.000 5.